<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 内容主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isAside ? '64px':'200px'">
        <!-- 侧边栏折叠按钮 -->
        <div class="toggle-button" @click="asideOnOff">|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isAside" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" :key="item.id" v-for="item in menulist" >
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconFontObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" :key="subItem.id" v-for="subItem in item.children" @click="saveNavState('/' + subItem.path)">
              <!-- 二级菜单模板 -->
              <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
            </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右侧内容 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      menulist: [],
      iconFontObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isAside: false,
      activePath: ''
    }
  },
  // 在页面一开始请求左侧菜单数据
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单列表数据
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    asideOnOff() {
      this.isAside = !this.isAside
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home_container {
  height: 100%;
}
// 头部盒子样式
.el-header {
  background-color: #383c3f;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
// 侧边栏样式
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: 0;
  }
}
// 内容主体右侧样式
.el-main {
  background-color: #eaedf1;
}
// 图标
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  text-align: center;
  color: #fff;
  font-size: 12px;
  line-height: 24px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
